Fossils can be found in the Earth's crust. 
The crust is the thinnest layer of the Earth. The fossils are most probably be found in this layer because it is the outermost layer. Also, the deeper the layer of the Earth, the higher the temperature that it has, and it probably cannot preserve the fossil. 
 
        
             
        
        
        
metals (left side of periodic table) become positive ions so calcium would be the answer 
 
        
             
        
        
        
The root tip allows the plant to grow deeper into the soil
        
             
        
        
        
Answer:
atmospheric pressure
Explanation:
hope this helps sweetheart
 
        
             
        
        
        
The research about Linnaeus helped us discover the similarities between different species.The fossils help us understand like taxonomy